You and I have been over this before as I recall Punisher, so may end up agreeing to disagree, but I'll try to explain my reasoning.
5/3/1 involves using a submaximal "Training Max", with working set intensities based on a percentage of that max. It also employs a deload either every 3 or every 6 weeks. These principles are very smart, but they are designed to facilitate continued longterm progress over many months, without stalling.
The TM is increased either 5 or 10 lbs every 3-week block. There are rep-max records set each week, but these are at a relatively low intensity as a % of 1RM... ESPECIALLY if the lifter's true 1RM is increasing faster than their Training Max.
For a relatively advanced lifter, this will not be the case. The TM will go up every 3 weeks, but it will be going up faster than the true 1RM, so eventually the TM will have to be reset. And the 5 forward 3 back cycle used.
But for a beginner, the TM is quickly going to lag WAY behind their true 1RM, because the latter is going up every training session while the former goes up every 3 weeks. The weight on the bar is going to get relatively lighter and lighter. Which is not optimal if the goal is increased strength.
For example, if I put my friend on 5/3/1 12 weeks ago based on his 135x5 squat, his TM would have been 137 lbs. Let's make it 150 because he technically did 135x5x3. That means after 12 weeks, even if we omit deload weeks completely (not recommended), his TM would be 190 lbs. That means the heaviest set he's working with is 181 lbs (95% of 190). Which is not very heavy. Not heavy ENOUGH, imo, for optimal strength progress. Assuming his strength increased at the same rate as if he'd done SS, his true 1RM at this point is 265x5 = 298 lbs. A guy who can or could squat 265x5 is instead doing his heaviest set of the entire MONTH with 180 lbs on the bar, repping it out for 12-15 reps. The "light" week will have only 162 lbs on the bar, which is very very light, if you compare it to the Prilepin chart.
So beginner on 5/3/1 will still be progressing each session in terms of doing more reps, but the weight on the bar is getting lighter and lighter (relatively), instead of getting heavier and heavier. The weight progression is not aggressive enough for a true beginner, unless you start adding joker sets and skipping deloads and increasing TM in bigger jumps -- which represents making major changes to the basic templates.